Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows - operating leases	$ 12,065	$ 9,398
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	$ 17,069	$ 4,881